sudo add-apt-repository ppa:ubuntu-mozilla-daily/ppa sudo apt-get update sudo apt-get -y install firefox-4.0
New features offered by Firefox 4
- New Tab Location - Tabs are given top visual priority for more efficient and intuitive browsing.
- Switch to Tab - Navigate more easily by switching to open tabs from your Awesome Bar.
- Firefox Button - All your menu items are in a single button for easy access and reduced clutter.
- Apps Tab - Take sites you always keep open—like Web mail--off your tab bar and give them a permanent home in your browser.